I recently discovered the JP2 format. I downloaded an extension that lets me import it into Adobe Photoshop CS3, and I also installed the software program Pixelmator. Now I'm just trying to understand how it compares to JPG in terms of quality and file size.
I thought JP2 was supposed to offer higher quality in a smaller file size, but when I export the same image @ 65% in both formats, the JPG is actually a smaller file size than JP2.
Actually, I should get straight to the point...I'm going to create an enormous library of images in the public domain, which I want to store in an image management system, Aperture for the time being. When I want to use an image on my website, I'll retrieve it from Aperture, process it in Photoshop and save it as a JPG, GIF or PNG. If you were going to store 10,000 images in Aperture, what format (JPG and JP2) and quality would you choose?
Photoshop apparently saves JPG images at 60% quality by default, and they look pretty nice to me.